Which Side of the Global Warming Debate Has Been Right?

Over the past four decades, Dr. Hansen, who is now widely considered one of the foremost climate scientists in the world, has grown increasingly concerned about the threat posed by man-made global warming and climate change, and our failure to seriously address this threat. Dr. Lindzen, on the other hand, has consistently been skeptical that human-caused global warming is anything to worry about. Although he does not currently dispute that our greenhouse gas emissions have caused a measurable amount of warming, Dr. Lindzen believes the climate is not very sensitive to changes in atmospheric greenhouse gases. The message from Dr. Hansen has consistently been that global warming is a growing threat which we're running out of time to address, while the message from Dr. Lindzen has consistently been that it's nothing to worry about.